Show pageBacklinksCite current pageExport to PDFBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Frontal mucocele ====== [[Mucocele]]s in the [[frontal sinus]] may be asymptomatic with insidious onset or present with headaches and facial pain. Forehead (supraorbital) swelling and [[orbital cellulitis]] may also be present. If there is orbital invasion, patients may have [[proptosis]] and [[diplopia]]. ===== Radiographic features ===== ==== CT ==== homogeneously low attenuating expansile lesion involving one of the ethmoid air cells does not enhance with contrast may demonstrate bony erosion of the sinus walls. Sinus contents tend to have a homogenous appearance used for surgical planning ==== MRI ==== useful for defining intracranial extension or obstructing malignancy contents of the mucocele produce different signal intensities depending on the amount of desiccated T1 water-rich content: low signal (most common) protein-rich content: high signal T2 water-rich content: high signal (most common) protein-rich content: low signal may look like an air-filled sinus in advanced disease T1 C+ (Gd): enhancement, if present, only occurs at the periphery DWI: variable ===== Differential diagnosis ===== Possible considerations include allergic fungal sinusitis no bony expansion mucus retention cyst does not completely fill the sinus no bony expansion sinonasal polyposis fibrous dysplasia https://radiopaedia.org/articles/frontal-mucocele-1 ===== Frontal mucocele after frontal sinus transgression ===== [[Frontal mucocele after frontal sinus transgression]] frontal_mucocele.txt Last modified: 2024/06/07 02:50by 127.0.0.1